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Finding the Fourth Proportional to 830.44, 1,245.63 and 343.48

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Solution

The fourth proportional to 830.44, 1,245.63 and 343.48 is: 515.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.44 : 1,245.63 = 343.48 : x
  2. Step 2: Convert to fraction form
    830.44/1,245.63 = 343.48/x
  3. Step 3: Cross multiply
    830.44x = 1,245.63 × 343.48
  4. Step 4: Simplify right side
    830.44x = 427,848.99
  5. Step 5: Solve for x
    x = 427,848.99/830.44
  6. Step 6: Final answer
    x = 515.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.